Instructions for Use RAUMEDIC
MPR2 logO
Manufacturer:
RAUMEDIC AG, Hermann-Staudinger-Strasse 2, 95233 Helmbrechts, Germany
Page 20 of 99
3.1.2.3.2 Retention of zero value
In case of nursing measures it may be necessary to sever the connection of the measuring chain on the
pressure catheter or on the MPR2. The pressure catheter remains in the implanted condition. A subsequent
conventional zeroing of the pressure catheter in implanted condition is not possible, however. For this
reason, the zero value of the first zeroing process in non-implanted condition has to be retained. This zero
value saved in the MPR2 will be taken over when the pressure catheter is connected again and when the
“Retention of zero value” option is selected.
Use this option only, if you are well aware of the function of this process.
Use this option only with the same pressure catheter.
3.1.2.3.3 Conventional zeroing
If conventional zeroing is carried out, the output signal of the pressure sensor is declared zero at this point
in time. Frequently external transducers or pressure catheters provide an output signal deviating from zero;
they produce an offset value. In case of conventional zeroing, this offset is removed for the current
measurement (internal correction).
Use this option only, if you are well aware of the function of this process.
Please ensure that zero pressure pushes up at the pressure sensor prior to starting conventional zeroing.
In pressure catheters, conventional zeroing may be carried out in non-implanted condition only.
3.2 Measurement of the partial oxygen pressure
3.2.1 General aspects
Applied part
type CF
Type:
fibre-optical sensor
Number:
1
Where:
Figure 2: Connection field, connection ports [19] and [20]
Application:
see below
When a special fibre-optical catheter (NEUROVENT-PTO) made by RAUMEDIC has been fitted, the MPR2
can be used to measure and display the partial oxygen pressure. The pressure channel is CF type and has
been classified as defibrillation protected.
Please observe the safety-related instructions (cf. chapter 1 Safety-related information).
Invasive procedures comprise risks for the patients. Apply aseptic techniques, and observe the
instructions of the catheter manufacturer.
Use only those accessories which have been listed in the overview in chapter 9 Accessories. No splitting
into spatially separate sensors for pressure and temperature may be effected at the multi-purpose port
P2/T2.
Please observe the instructions of the catheter manufacturer.
Please observe the notes on the special features of optical fibres rendered in the instructions for use of
the PTO catheter.
Please observe the notes on cleaning and protection of the optical plug-in connector rendered in the
instructions for use of the FOC.
The fibre-optical sensor is always connected to the following two sockets: Connection of the optical signal
through FOC to ST port Figure 2: Connection field, connection port [19]; the PTO cable to P2/T2 port Figure
2: Connection field, connection port [20]. Fibre-optical sensors of RAUMEDIC only may be connected. In
the process, please observe that apart from the FOC the PTO cable always has to be connected. All
information on the type of catheter, its usability, the measuring location and the calibration parameters have
been saved to the digital memory which is read out by the MPR2 via the PTO cable. When a catheter of
the NEUROVENT-PTO type is connected, for example, the digital memory will allocate the ICP2 measuring
location to the invasive pressure automatically. A partial oxygen pressure measurement without the PTO
cable is not possible.
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